Journal: Heliyon

Article Title: Thermoelectric bismuth telluride nanostructures fabricated by electrodeposition within flexible templates.

doi: 10.1016/j.heliyon.2024.e36114

Figure Lengend Snippet: Fig. 2. a) SEM image of the nanoporous surface of a commercial polyester filter as purchased (shown in a photo in the inset), and b) with the conductive layer (the inset shows a photo of a sample at this stage), showing that some of the nanopores has not been covered after electron-beam evaporation of 5 nm Cr and 150 nm Au or c) higher thicknesses of gold. d) compositional sensitive SEM image of a lateral view of filter with electron- beam deposited conductive layer after electrodeposition of Bi2Te3. Gold and bismuth telluride appear lighter, and it can be seen that the filling rate is quite low. e) SEM image of the surface of a commercial polyester filter after the Cr and Au electron-beam deposition and electrochemical deposition of gold. No open pores can be found. f) Compositional sensitive SEM image of a filter prepared as in e) where the complete filling of the membrane can be observed. g) and h) show details of the nanowire-like structures, with secondary (g) and backscattered (h) electrons.

Article Snippet: The templates used were commercial polyester nanoporous filters (from Sterlitech Corp., with cylindrical pores of 200 ± 20 nm in diameter and a total thickness of 10 μm and a diameter of 130 mm).

Techniques: Evaporation, Membrane